PHP智能把图片生成缩略图类

<?php
/**
 * 调用示例
 * */
session_start();
$randCode = '';
$chars = 'abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPRSTUVWXYZ23456789';
for ( $i = 0; $i < 4; $i++ )
{
 $randCode .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
$_SESSION['code'] = strtoupper($randCode);   // 记录session
ImageCode($randCode, 60);    // 显示GIF动画

/**
 * ImageCode 生成GIF图片验证
 * @param $string 字符串
 * @param $width 宽度
 * @param $height 高度
 * */
function ImageCode($string = '', $width = 75, $height = 25)
{
 $authstr = $string ? $string : ((time() % 2 == 0) ? mt_rand(1000, 9999) : mt_rand(10000, 99999));
 
 $board_width = $width;
 $board_height = $height;
 // 生成一个32帧的GIF动画
 for($i = 0; $i < 32; $i++)
 {
  ob_start();
     $image = imagecreate($board_width, $board_height);
     imagecolorallocate($image, 0,0,0);
     // 设定文字颜色数组
   $colorList[] = ImageColorAllocate($image, 15,73,210);
   $colorList[] = ImageColorAllocate($image, 0,64,0);
   $colorList[] = ImageColorAllocate($image, 0,0,64);
   $colorList[] = ImageColorAllocate($image, 0,128,128);
   $colorList[] = ImageColorAllocate($image, 27,52,47);
   $colorList[] = ImageColorAllocate($image, 51,0,102);
   $colorList[] = ImageColorAllocate($image, 0,0,145);
   $colorList[] = ImageColorAllocate($image, 0,0,113);
   $colorList[] = ImageColorAllocate($image, 0,51,51);
   $colorList[] = ImageColorAllocate($image, 158,180,35);
   $colorList[] = ImageColorAllocate($image, 59,59,59);
   $colorList[] = ImageColorAllocate($image, 0,0,0);
   $colorList[] = ImageColorAllocate($image, 1,128,180);
   $colorList[] = ImageColorAllocate($image, 0,153,51);
   $colorList[] = ImageColorAllocate($image, 60,131,1);
   $colorList[] = ImageColorAllocate($image, 0,0,0);
   $fontcolor = ImageColorAllocate($image, 0,0,0);
   $gray = ImageColorAllocate($image, 245,245,245);
   
     $color = imagecolorallocate($image, 255,255,255);
     $color2 = imagecolorallocate($image, 255,0,0);
    
     imagefill($image, 0, 0, $gray);
    
     $space = 15;  // 字符间距
     if($i > 0)   // 屏蔽第一帧
     {
      for ($k = 0; $k < strlen($authstr); $k++)
      {
    $colorRandom = mt_rand(0,sizeof($colorList)-1);
    $float_top = rand(0,4);
    $float_left = rand(0,3);
    imagestring($image, 6, $space * $k, $top + $float_top, substr($authstr, $k, 1), $colorList[$colorRandom]);
   }
     }
    
  for ($k = 0; $k < 20; $k++)
  {
   $colorRandom = mt_rand(0,sizeof($colorList)-1);
    imagesetpixel($image, rand()%70 , rand()%15 , $colorList[$colorRandom]);
 
  }
  // 添加干扰线
  for($k = 0; $k < 3; $k++)
  {
   $colorRandom = mt_rand(0, sizeof($colorList)-1);
   // $todrawline = rand(0,1);
   $todrawline = 1;
   if($todrawline)
   {
    imageline($image, mt_rand(0, $board_width), mt_rand(0,$board_height), mt_rand(0,$board_width), mt_rand(0,$board_height), $colorList[$colorRandom]);
   }
   else
   {
    $w = mt_rand(0,$board_width);
    $h = mt_rand(0,$board_width);
    imagearc($image, $board_width - floor($w / 2) , floor($h / 2), $w, $h,  rand(90,180), rand(180,270), $colorList[$colorRandom]);
   }
  }
     imagegif($image);
     imagedestroy($image);
     $imagedata[] = ob_get_contents();
     ob_clean(); 
     ++$i; 
 }
 
 $gif = new GIFEncoder($imagedata); 
 Header ('Content-type:image/gif'); 
 echo $gif->GetAnimation(); 
}

/**
 * GIFEncoder类
 * */
Class GIFEncoder
{
    var $GIF = "GIF89a";                /* GIF header 6 bytes        */ 
    var $VER = "GIFEncoder V2.06";        /* Encoder version             */ 

    var $BUF = Array ( ); 
    var $LOP =  0; 
    var $DIS =  2; 
    var $COL = -1; 
    var $IMG = -1; 

    var $ERR = Array ( 
        'ERR00' =>"Does not supported function for only one image!", 
        'ERR01' =>"Source is not a GIF image!", 
        'ERR02' =>"Unintelligible flag ", 
        'ERR03' =>"Could not make animation from animated GIF source", 
    ); 
   
    function GIFEncoder ($GIF_src, $GIF_dly = 100, $GIF_lop = 0, $GIF_dis = 0,  $GIF_red = 0, $GIF_grn = 0, $GIF_blu = 0, $GIF_mod = 'bin' )
    { 
        if (!is_array($GIF_src) && !is_array($GIF_tim))
        { 
            printf ( "%s: %s", $this->VER, $this->ERR['ERR00']); 
            exit( 0 );
        } 
        $this->LOP = ($GIF_lop > -1) ? $GIF_lop : 0; 
        $this->DIS = ($GIF_dis > -1) ? (( $GIF_dis < 3 ) ? $GIF_dis : 3) : 2; 
        $this->COL = ($GIF_red > -1 && $GIF_grn > -1 && $GIF_blu > -1) ? ($GIF_red | ($GIF_grn << 8) | ($GIF_blu << 16)) : -1; 

        for ($i = 0, $src_count = count($GIF_src); $i < $src_count; $i++ )
        {
            if (strToLower( $GIF_mod ) == "url")
            { 
             $this->BUF[] = fread (fopen($GIF_src [$i], "rb"), filesize ($GIF_src [$i])); 
            } 
            elseif(strToLower($GIF_mod) == "bin")
            { 
                $this->BUF [ ] = $GIF_src [ $i ]; 
            } 
            else
            { 
                printf("%s: %s ( %s )!", $this->VER, $this->ERR [ 'ERR02' ], $GIF_mod); 
                exit(0); 
            } 
            if (substr($this->BUF[$i], 0, 6) != "GIF87a" && substr($this->BUF [$i], 0, 6) != "GIF89a")
            { 
                printf( "%s: %d %s", $this->VER, $i, $this->ERR ['ERR01']); 
                exit(0); 
            } 
            for ($j = (13 + 3 * (2 << (ord($this->BUF[$i]{10}) & 0x07 ))), $k = TRUE; $k; $j++)
            { 
                switch ($this->BUF [$i]{$j})
                { 
                    case "!": 
                        if ((substr($this->BUF[$i], ($j + 3), 8)) == "NETSCAPE")
                        { 
                                printf( "%s: %s ( %s source )!", $this->VER, $this->ERR ['ERR03'], ($i + 1)); 
                                exit( 0 ); 
                        } 
                        break; 
                    case ";": 
                        $k = FALSE; 
                        break; 
                } 
            } 
        } 
        GIFEncoder::GIFAddHeader(); 
        for($i = 0, $count_buf = count($this->BUF); $i < $count_buf; $i++)
        { 
         GIFEncoder::GIFAddFrames($i, $GIF_dly[$i]); 
        } 
        GIFEncoder::GIFAddFooter(); 
    } 
   
    function GIFAddHeader ( )
    { 
  $cmap = 0; 
  
  if (ord($this->BUF[0]{10}) & 0x80 )
  { 
   $cmap = 3 * ( 2 << ( ord ( $this->BUF [ 0 ]{10} ) & 0x07 )); 
   
   $this->GIF .= substr ( $this->BUF [ 0 ], 6, 7); 
   $this->GIF .= substr ( $this->BUF [ 0 ], 13, $cmap); 
   $this->GIF .= "!37713NETSCAPE2.031" . GIFEncoder::GIFWord ( $this->LOP ) . ""; 
  } 
    } 
   
    function GIFAddFrames ( $i, $d )
    { 

        $Locals_str = 13 + 3 * (2 <<(ord($this->BUF[$i]{10}) & 0x07)); 

        $Locals_end = strlen($this->BUF[$i]) - $Locals_str - 1; 
        $Locals_tmp = substr ($this->BUF[$i], $Locals_str, $Locals_end); 

        $Global_len = 2 << (ord( $this->BUF [0]{10} ) & 0x07 ); 
        $Locals_len = 2 << (ord( $this->BUF[$i]{10}) & 0x07); 

        $Global_rgb = substr($this->BUF[0], 13, 3 * (2 << ( ord ( $this->BUF[0]{10} ) & 0x07))); 
        $Locals_rgb = substr ( $this->BUF[$i], 13, 3 * (2 << ( ord ( $this->BUF[$i]{10} ) & 0x07))); 

        $Locals_ext = "!xF9x04" . chr(($this->DIS << 2) + 0) . chr(($d >> 0) & 0xFF) . chr(($d >> 8) & 0xFF) . "x0x0"; 

        if ( $this->COL > -1 && ord($this->BUF[$i]{10}) & 0x80)
        { 
            for($j = 0; $j < (2 << (ord( $this->BUF[$i]{10}) & 0x07)); $j++ )
            { 
                if(ord ($Locals_rgb{3 * $j + 0}) == ($this->COL >>  0) & 0xFF && ord ( $Locals_rgb { 3 * $j + 1 } ) == ( $this->COL >>  8 ) & 0xFF && ord ( $Locals_rgb { 3 * $j + 2 } ) == ( $this->COL >> 16 ) & 0xFF )
                { 
                    $Locals_ext = "!xF9x04" . chr(($this->DIS << 2) + 1) . chr (( $d >> 0) & 0xFF) . chr (( $d >> 8) & 0xFF) . chr ($j) . "x0"; 
                    break; 
                } 
            } 
        } 
        switch ( $Locals_tmp { 0 } )
        { 
            case "!": 
                $Locals_img = substr($Locals_tmp, 8, 10); 
                $Locals_tmp = substr($Locals_tmp, 18, strlen ($Locals_tmp) - 18); 
                break; 
            case ",": 
                $Locals_img = substr($Locals_tmp, 0, 10); 
                $Locals_tmp = substr($Locals_tmp, 10, strlen($Locals_tmp) - 10); 
                break; 
        } 
        if ( ord ( $this->BUF[$i]{10} ) & 0x80 && $this->IMG > -1 )
        { 
            if ( $Global_len == $Locals_len )
            { 
    if ( GIFEncoder::GIFBlockCompare ( $Global_rgb, $Locals_rgb, $Global_len ) )
    { 
     $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp ); 
    } 
    else
    { 
     $byte  = ord ( $Locals_img{9}); 
     $byte |= 0x80; 
     $byte &= 0xF8; 
     $byte |= ( ord ( $this->BUF [ 0 ]{10}) & 0x07); 
     $Locals_img{9} = chr($byte); 
     $this->GIF .= ($Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp); 
    } 
            } 
            else
            { 
                $byte  = ord($Locals_img{9}); 
                $byte |= 0x80; 
                $byte &= 0xF8; 
                $byte |= (ord($this->BUF[$i]{10}) & 0x07); 
                $Locals_img {9} = chr($byte); 
                $this->GIF .= ($Locals_ext . $Locals_img . $Locals_rgb . $Locals_tmp); 
            } 
        } 
        else
        { 
            $this->GIF .= ( $Locals_ext . $Locals_img . $Locals_tmp ); 
        } 
        $this->IMG  = 1; 
    } 
   
    function GIFAddFooter ( ) { 
        $this->GIF .= ";"; 
    } 
   
    function GIFBlockCompare ( $GlobalBlock, $LocalBlock, $Len )
    { 
        for ( $i = 0; $i < $Len; $i++ )
        { 
            if($GlobalBlock { 3 * $i + 0 } != $LocalBlock { 3 * $i + 0 } || $GlobalBlock { 3 * $i + 1 } != $LocalBlock { 3 * $i + 1 } || $GlobalBlock { 3 * $i + 2 } != $LocalBlock{3 * $i + 2})
            { 
                return ( 0 ); 
            } 
        } 
        return ( 1 ); 
    } 
   
    function GIFWord ( $int )
    { 
       return ( chr ( $int & 0xFF ) . chr ( ( $int >> 8 ) & 0xFF ) ); 
    } 
   
    function GetAnimation ( )
    { 
        return ($this->GIF); 
    } 
}

 
/**********************
*@filename - path to the image
*@tmpname - temporary path to thumbnail
*@xmax - max width
*@ymax - max height
*/
function resize_image($filename, $tmpname, $xmax, $ymax)
{
    $ext = explode(".", $filename);
    $ext = $ext[count($ext)-1];

    if($ext == "jpg" || $ext == "jpeg")
        $im = imagecreatefromjpeg($tmpname);
    elseif($ext == "png")
        $im = imagecreatefrompng($tmpname);
    elseif($ext == "gif")
        $im = imagecreatefromgif($tmpname);

    $x = imagesx($im);
    $y = imagesy($im);

    if($x <= $xmax && $y <= $ymax)
        return $im;

    if($x >= $y) {
        $newx = $xmax;
        $newy = $newx * $y / $x;
    }
    else {
        $newy = $ymax;
        $newx = $x / $y * $newy;
    }

    $im2 = imagecreatetruecolor($newx, $newy);
    imagecopyresized($im2, $im, 0, 0, 0, 0, floor($newx), floor($newy), $x, $y);
    return $im2;
}

function creat_thumbnail($img,$w,$h,$path)
{
 $org_info = getimagesize($img); //获得图像大小且是通过post传递过来的
 //var_dump($org_info);
 //Array ( [0] => 1024 [1] => 768 [2] => 3 [3] => width="1024" height="768" [bits] => 8 [mime] => image/png )
 $orig_x = $org_info[0]; //图像宽度
 $orig_y = $org_info[1]; //图像高度
 $orig_type = $org_info[2]; //图片类别即后缀 1 = GIF，2 = JPG，3 = PNG，

 //是真彩色图像
 if (function_exists("imagecreatetruecolor"))
 {
  switch($orig_type)
  {
   //从给定的gif文件名中取得的图像
   case 1  : $thumb_type = ".gif"; $_creatImage = "imagegif"; $_function = "imagecreatefromgif";
   break;
   //从给定的jpeg,jpg文件名中取得的图像
   case 2  : $thumb_type = ".jpg"; $_creatImage = "imagejpeg"; $_function = "imagecreatefromjpeg";
   break;
   //从给定的png文件名中取得的图像
   case 3  : $thumb_type = ".png"; $_creatImage = "imagepng"; $_function = "imagecreatefrompng";
   break;
  }
 }
 //如果从给定的文件名可取得的图像
 if(function_exists($_function))
 {
  $orig_image = $_function($img); //从给定的$img文件名中取得的图像
 }
 if (($orig_x / $orig_y) >= (4 / 3)) //如果宽/高 >= 4/3
 {
  $y = round($orig_y / ($orig_x / $w)); //对浮点数进行四舍五入
  $x = $w;
 }
 else //即 高/宽 >= 4/3
 {
  $x = round($orig_x / ($orig_y / $h));
  $y = $h;
 }
 $sm_image = imagecreatetruecolor($x, $y); //创建真彩色图片
 //重采样拷贝部分图像并调整大小
 Imagecopyresampled($sm_image, $orig_image, 0, 0, 0, 0, $x, $y, $orig_x, $orig_y);
 //imageJPEG($sm_image, '', 80); //在浏览器输出图像
 $tnpath = $path."/"."s_".date('YmdHis').$thumb_type; //缩略图的路径
 $thumbnail = @$_creatImage($sm_image, $tnpath, 80); //生成图片,成功返回true(或1)
 imagedestroy ($sm_image); //销毁图像
 if($thumbnail==true)
 {
  return $tnpath;
 }
}

class resizeimage 
{ 
    //图片类型 
    var $type; 
    //实际宽度 
    var $width; 
    //实际高度 
    var $height; 
    //改变后的宽度 
    var $resize_width; 
    //改变后的高度 
    var $resize_height; 
    //是否裁图 
    var $cut; 
    //源图象 
    var $srcimg; 
    //目标图象地址 
    var $dstimg; 
    //临时创建的图象 
    var $im; 
    function resizeimage($img, $wid, $hei,$c,$dstpath) 
    { 
        $this->srcimg = $img; 
        $this->resize_width = $wid; 
        $this->resize_height = $hei; 
        $this->cut = $c; 
        //图片的类型 

$this->type = strtolower(substr(strrchr($this->srcimg,"."),1)); 
        //初始化图象 
        $this->initi_img(); 
        //目标图象地址 
        $this -> dst_img($dstpath); 
        //-- 
        $this->width = imagesx($this->im); 
        $this->height = imagesy($this->im); 
        //生成图象 
        $this->newimg(); 
        ImageDestroy ($this->im); 
    } 
    function newimg() 
    { 
        //改变后的图象的比例 
        $resize_ratio = ($this->resize_width)/($this->resize_height); 
        //实际图象的比例 
        $ratio = ($this->width)/($this->height); 
        if(($this->cut)=="1") 
        //裁图 
        { 
            if($ratio>=$resize_ratio) 
            //高度优先 
            { 
                $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height); 
                imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width,$this->resize_height, (($this->height)*$resize_ratio), $this->height); 
                ImageJpeg ($newimg,$this->dstimg); 
            } 
            if($ratio<$resize_ratio) 
            //宽度优先 
            { 
                $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height); 
                imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, $this->resize_height, $this->width, (($this->width)/$resize_ratio)); 
                ImageJpeg ($newimg,$this->dstimg); 
            } 
        } 
        else
        //不裁图 
        { 
            if($ratio>=$resize_ratio) 
            { 
                $newimg = imagecreatetruecolor($this->resize_width,($this->resize_width)/$ratio); 
                imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, ($this->resize_width)/$ratio, $this->width, $this->height); 
                ImageJpeg ($newimg,$this->dstimg); 
            } 
            if($ratio<$resize_ratio) 
            { 
                $newimg = imagecreatetruecolor(($this->resize_height)*$ratio,$this->resize_height); 
                imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, ($this->resize_height)*$ratio, $this->resize_height, $this->width, $this->height); 
                ImageJpeg ($newimg,$this->dstimg); 
            } 
        } 
    } 
    //初始化图象 
    function initi_img() 
    { 
        if($this->type=="jpg") 
        { 
            $this->im = imagecreatefromjpeg($this->srcimg); 
        } 
        if($this->type=="gif") 
        { 
            $this->im = imagecreatefromgif($this->srcimg); 
        } 
        if($this->type=="png") 
        { 
            $this->im = imagecreatefrompng($this->srcimg); 
        } 
    } 
    //图象目标地址 
    function dst_img($dstpath) 
    { 
        $full_length  = strlen($this->srcimg); 
        $type_length  = strlen($this->type); 
        $name_length  = $full_length-$type_length; 

        $name         = substr($this->srcimg,0,$name_length-1); 
        $this->dstimg = $dstpath; 

//echo $this->dstimg; 
    } 
} 

$resizeimage = new resizeimage("11.jpg", "200", "150", "1","17.jpg"); 
?>

<?php

/**
 * 生成缩略图
 * @author yangzhiguo0903@163.com
 * @param string     源图绝对完整地址{带文件名及后缀名}
 * @param string     目标图绝对完整地址{带文件名及后缀名}
 * @param int        缩略图宽{0:此时目标高度不能为0，目标宽度为源图宽*(目标高度/源图高)}
 * @param int        缩略图高{0:此时目标宽度不能为0，目标高度为源图高*(目标宽度/源图宽)}
 * @param int        是否裁切{宽,高必须非0}
 * @param int/float  缩放{0:不缩放, 0<this<1:缩放到相应比例(此时宽高限制和裁切均失效)}
 * @return boolean
 */
function img2thumb($src_img, $dst_img, $width = 75, $height = 75, $cut = 0, $proportion = 0)
{
    if(!is_file($src_img))
    {
        return false;
    }
    $ot = fileext($dst_img);
    $otfunc = 'image' . ($ot == 'jpg' ? 'jpeg' : $ot);
    $srcinfo = getimagesize($src_img);
    $src_w = $srcinfo[0];
    $src_h = $srcinfo[1];
    $type  = strtolower(substr(image_type_to_extension($srcinfo[2]), 1));
    $createfun = 'imagecreatefrom' . ($type == 'jpg' ? 'jpeg' : $type);

    $dst_h = $height;
    $dst_w = $width;
    $x = $y = 0;

    /**
     * 缩略图不超过源图尺寸（前提是宽或高只有一个）
     */
    if(($width> $src_w && $height> $src_h) || ($height> $src_h && $width == 0) || ($width> $src_w && $height == 0))
    {
        $proportion = 1;
    }
    if($width> $src_w)
    {
        $dst_w = $width = $src_w;
    }
    if($height> $src_h)
    {
        $dst_h = $height = $src_h;
    }

    if(!$width && !$height && !$proportion)
    {
        return false;
    }
    if(!$proportion)
    {
        if($cut == 0)
        {
            if($dst_w && $dst_h)
            {
                if($dst_w/$src_w> $dst_h/$src_h)
                {
                    $dst_w = $src_w * ($dst_h / $src_h);
                    $x = 0 - ($dst_w - $width) / 2;
                }
                else
                {
                    $dst_h = $src_h * ($dst_w / $src_w);
                    $y = 0 - ($dst_h - $height) / 2;
                }
            }
            else if($dst_w xor $dst_h)
            {
                if($dst_w && !$dst_h)  //有宽无高
                {
                    $propor = $dst_w / $src_w;
                    $height = $dst_h  = $src_h * $propor;
                }
                else if(!$dst_w && $dst_h)  //有高无宽
                {
                    $propor = $dst_h / $src_h;
                    $width  = $dst_w = $src_w * $propor;
                }
            }
        }
        else
        {
            if(!$dst_h)  //裁剪时无高
            {
                $height = $dst_h = $dst_w;
            }
            if(!$dst_w)  //裁剪时无宽
            {
                $width = $dst_w = $dst_h;
            }
            $propor = min(max($dst_w / $src_w, $dst_h / $src_h), 1);
            $dst_w = (int)round($src_w * $propor);
            $dst_h = (int)round($src_h * $propor);
            $x = ($width - $dst_w) / 2;
            $y = ($height - $dst_h) / 2;
        }
    }
    else
    {
        $proportion = min($proportion, 1);
        $height = $dst_h = $src_h * $proportion;
        $width  = $dst_w = $src_w * $proportion;
    }

    $src = $createfun($src_img);
    $dst = imagecreatetruecolor($width ? $width : $dst_w, $height ? $height : $dst_h);
    $white = imagecolorallocate($dst, 255, 255, 255);
    imagefill($dst, 0, 0, $white);

    if(function_exists('imagecopyresampled'))
    {
        imagecopyresampled($dst, $src, $x, $y, 0, 0, $dst_w, $dst_h, $src_w, $src_h);
    }
    else
    {
        imagecopyresized($dst, $src, $x, $y, 0, 0, $dst_w, $dst_h, $src_w, $src_h);
    }
    $otfunc($dst, $dst_img);
    imagedestroy($dst);
    imagedestroy($src);
    return true;
}

$src_img = "./ROSI_050_002.JPG";
$dst_img = "./ROSI_050_002_thumb.jpg";
$stat = img2thumb($src_img, $dst_img, $width = 200, $height = 300, $cut = 0, $proportion = 0);
if($stat){
 echo 'Resize Image Success!<br />';
 echo '<img src="'.$dst_img.'" />'; 
}else{
 echo 'Resize Image Fail!'; 
}

<?php
Header("Content-type: image/png");      /*通知浏览器,要输出图像*/
$im       = imagecreate(400 , 300);        /*定义图像的大小*/
$gray     = ImageColorAllocate($im , 235 , 235 , 235);
$pink     = ImageColorAllocate($im, 255 , 128 , 255);

$fontfile = "simkai.ttf";

/* $fontfile 字体的路径,视操作系统而定,可以是 simhei.ttf(黑体) , SIMKAI.TTF(楷体) , SIMFANG.TTF(仿宋) ,SIMSUN.TTC(宋体&新宋体) 等 GD 支持的中文字体*/
$str   = iconv('GB2312','UTF-8','中文水印');     /*将 gb2312 的字符集转换成 UTF-8 的字符*/
ImageTTFText($im, 30, 0, 100, 200, $pink , $fontfile , $str);
/* 加入中文水印 */
Imagepng($im);
ImageDestroy($im);
?>

<?php
// **************************************** //
// 功能:给图片添加文字
// 参数: $img 图片文件名
// $new_img 另存图片文件名,如果为空表示不另存图片
// $text 字符串内容
// text_size 字符串大小
// text_angle 字型串输出角度
// text_x 字符串输出 x 坐标
// text_y 字符串输出 y 坐标
// $text_font 字型文件名
// $r,$g,$b 字符串颜色RGB值
// **************************************** //
function img_text($img, $new_img, $text, $text_size, $text_angle, $text_x, $text_y, $text_font, $r, $g, $b){

$text=iconv("gb2312","UTF-8",$text);
Header("Content-type: image/gif");
$im = @imagecreatefromstring(file_get_contents($img)) or die ("打开图片失败!");
$color = ImageColorAllocate($im, $r,$g,$b);

//ImageTTFText(int im, int size, int angle, int x, int y, int col, string fontfile, string text)：
//本函数将 TTF (TrueType Fonts) 字型文字写入图片。
//参数: size 为字形的尺寸；
// angle 为字型的角度，顺时针计算，0 度为水平(由左到右)，90 度则为由下到上的文字；
// x,y 二参数为文字的坐标值 (原点为左上角)；
// col 为字的颜色；
// fontfile 为字型文件名称；
// text 是字符串内容。
ImageTTFText($im, $text_size, $text_angle, $text_x, $text_y, $color, $text_font, $text);

if ($new_img==""):
ImageGif($im); // 不保存图片,只显示
else:
ImageGif($im,$new_img); // 保存图片,但不显示
endif;

ImageDestroy($im); //结束图形，释放内存空间
}  
?>

<?php
/*
* 功能：PHP图片水印 (水印支持图片或文字)
* 参数：
* $groundImage 背景图片，即需要加水印的图片，暂只支持GIF,JPG,PNG格式；
* $waterPos 水印位置，有10种状态，0为随机位置；
* 1为顶端居左，2为顶端居中，3为顶端居右；
* 4为中部居左，5为中部居中，6为中部居右；
* 7为底端居左，8为底端居中，9为底端居右；
* $waterImage 图片水印，即作为水印的图片，暂只支持GIF,JPG,PNG格式；
* $waterText 文字水印，即把文字作为为水印，支持ASCII码，不支持中文；
* $textFont 文字大小，值为1、2、3、4或5，默认为5；
* $textColor 文字颜色，值为十六进制颜色值，默认为#FF0000(红色)；
*
* 注意：Support GD 2.0，Support FreeType、GIF Read、GIF Create、JPG 、PNG
* $waterImage 和 $waterText 最好不要同时使用，选其中之一即可，优先使用 $waterImage。
* 当$waterImage有效时，参数$waterString、$stringFont、$stringColor均不生效。
* 加水印后的图片的文件名和 $groundImage 一样。
* 作者：longware @ 2004-11-3 14:15:13
*/
function imageWaterMark($groundImage,$waterPos=0,$waterImage=”",$waterText=”",$textFont=5,$textColor=”#FF0000″)
{
$isWaterImage = FALSE;
$formatMsg = “暂不支持该文件格式，请用图片处理软件将图片转换为GIF、JPG、PNG格式。”;

//读取水印文件
if(!emptyempty($waterImage) && file_exists($waterImage))
{
$isWaterImage = TRUE;
$water_info = getimagesize($waterImage);
$water_w = $water_info[0];//取得水印图片的宽
$water_h = $water_info[1];//取得水印图片的高

switch($water_info[2])//取得水印图片的格式
{
case 1:$water_im = imagecreatefromgif($waterImage);break;
case 2:$water_im = imagecreatefromjpeg($waterImage);break;
case 3:$water_im = imagecreatefrompng($waterImage);break;
default:die($formatMsg);
}
}

//读取背景图片
if(!emptyempty($groundImage) && file_exists($groundImage))
{
$ground_info = getimagesize($groundImage);
$ground_w = $ground_info[0];//取得背景图片的宽
$ground_h = $ground_info[1];//取得背景图片的高

switch($ground_info[2])//取得背景图片的格式
{
case 1:$ground_im = imagecreatefromgif($groundImage);break;
case 2:$ground_im = imagecreatefromjpeg($groundImage);break;
case 3:$ground_im = imagecreatefrompng($groundImage);break;
default:die($formatMsg);
}
}
else
{
die(”需要加水印的图片不存在！”);
}

//水印位置
if($isWaterImage)//图片水印
{
$w = $water_w;
$h = $water_h;
$label = “图片的”;
}
else//文字水印
{
$temp = imagettfbbox(ceil($textFont*5),0,”./cour.ttf”,$waterText);//取得使用 TrueType 字体的文本的范围
$w = $temp[2] - $temp[6];
$h = $temp[3] - $temp[7];
unset($temp);
$label = “文字区域”;
}
if( ($ground_w<$w) || ($ground_h<$h) )
{
echo “需要加水印的图片的长度或宽度比水印”.$label.”还小，无法生成水印！”;
return;
}
switch($waterPos)
{
case 0://随机
$posX = rand(0,($ground_w - $w));
$posY = rand(0,($ground_h - $h));
break;
case 1://1为顶端居左
$posX = 0;
$posY = 0;
break;
case 2://2为顶端居中
$posX = ($ground_w - $w) / 2;
$posY = 0;
break;
case 3://3为顶端居右
$posX = $ground_w - $w;
$posY = 0;
break;
case 4://4为中部居左
$posX = 0;
$posY = ($ground_h - $h) / 2;
break;
case 5://5为中部居中
$posX = ($ground_w - $w) / 2;
$posY = ($ground_h - $h) / 2;
break;
case 6://6为中部居右
$posX = $ground_w - $w;
$posY = ($ground_h - $h) / 2;
break;
case 7://7为底端居左
$posX = 0;
$posY = $ground_h - $h;
break;
case 8://8为底端居中
$posX = ($ground_w - $w) / 2;
$posY = $ground_h - $h;
break;
case 9://9为底端居右
$posX = $ground_w - $w;
$posY = $ground_h - $h;
break;
default://随机
$posX = rand(0,($ground_w - $w));
$posY = rand(0,($ground_h - $h));
break;
}

//设定图像的混色模式
imagealphablending($ground_im, true);

if($isWaterImage)//图片水印
{
imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);//拷贝水印到目标文件
}
else//文字水印
{
if( !emptyempty($textColor) && (strlen($textColor)==7) )
{
$R = hexdec(substr($textColor,1,2));
$G = hexdec(substr($textColor,3,2));
$B = hexdec(substr($textColor,5));
}
else
{
die(”水印文字颜色格式不正确！”);
}
imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));
}

//生成水印后的图片
@unlink($groundImage);
switch($ground_info[2])//取得背景图片的格式
{
case 1:imagegif($ground_im,$groundImage);break;
case 2:imagejpeg($ground_im,$groundImage);break;
case 3:imagepng($ground_im,$groundImage);break;
default:die($errorMsg);
}

//释放内存
if(isset($water_info)) unset($water_info);
if(isset($water_im)) imagedestroy($water_im);
unset($ground_info);
imagedestroy($ground_im);
}
//—————————————————————————————
$id=$_REQUEST['id'];
$num = count($_FILES['userfile']['name']);
print_r($_FILES['userfile']);
print_r($_FILES['userfile']['name']);

echo $num;
echo “<bR>”;
if(isset($id)){
for($i=0;$i<$id;$i++){

if(isset($_FILES) && !emptyempty($_FILES['userfile']) && $_FILES['userfile']['size']>0)
{
$uploadfile = “./”.time().”_”.$_FILES['userfile'][name][$i];
echo “<br>”;
echo $uploadfile;
if (copy($_FILES['userfile']['tmp_name'][$i], $uploadfile))
{
echo “OK<br>”;

//文字水印
//imageWaterMark($uploadfile,5,”",”HTTP://www.lvye.info”,5,”#cccccc“);

//图片水印
$waterImage=”logo_ok1.gif”;//水印图片路径
imageWaterMark($uploadfile,9,$waterImage);

echo “<img src=”".$uploadfile.”” border=”0”>”;
}
else
{
echo “Fail<br>”;
}
}
}
}

?>
<form enctype=”multipart/form-data” method=”POST”>
<?php
for($a=0;$a<$id;$a++){
echo “文件: <input name=”userfile[]” type=”file”><br>”;

}
?>
<input type=”submit” value=”上传”>
</form>